Therefore we ought to give the more earnest heed to the things which we have heard, lest at any time we should let them slip. (Hebrews 2:1)

This book was written to the Jews who were so fond of the law and felt it was the way to God.
The writer of Hebrews is writing to encourage them to follow Jesus and show how the Gospel (Jesus) is greater than the law.

In the previous chapter, the writer explains the superiority of Jesus over prophets, angels and creation. As the chapter concludes he leaves us with the thought of the eternal Christ and His angels ministering to the heirs of Salvation.

It is therefore fitting that he begin chapter two with the subject of Salvation.
How he begins chapter 2 though is rather interesting…